Feature

Technology for Protecting People

1980
Tsuiji Works

52

November
2021

COLUMN
Cover image:

Tsuiji Works
1980

In the 1970s, as computers began appearing, the office automation
market rapidly expanded.
To meet these market needs, SANYO DENKI newly built Tsuiji BranchWorks (current Tsuiji Works) in Ueda in March 1980, as a dedicatedmachining factory, following Shioda Works which was opened theprevious year.
In 1982, both factories were expanded to meet increased stepping motor
demand for use in printers and hard disk drives. Through these
expansions, our production capabilities of cooling fans and stepping
motors were greatly improved in terms of capacity and efficiency.
Currently, Tsuiji Works is used for a variety of operations such asassembling servo motor connectors and cables, assembling stepping
drivers, assembling power distribution boards, producing control panels,
and repairing servo motors and amplifiers.

52
November 2021

SANYO DENKI TECHNICAL REPORT
C

O

N

T

E

N

T

S

Aiming to Develop Technology
for Protecting People Executive Operating Officer Keiichi Kitamura

1

Features: Technology for Protecting People

3■ Cooling Systems Division

Cooling Technology for Protecting People

Toshiyuki Nakamura .................................... 3ø172 × 150 × 51 mm San Ace 172AD 9AD Type ACDC Fanand San Ace 172AD 9ADW Type Splash Proof ACDC Fan Naoya Ozumi and Others ..... 7
Development of Low Noise Fans San Ace 60, San Ace 80,
San Ace 92, and San Ace 120 9RA Type Ryo Shimizu and Others ........................................ 12■ Power Systems Division

Power Technology for Protecting People

Akira Miura .................................................. 20

Development of the Small-Capacity UPS SANUPS E11B-Li
and SANUPS A11M-Li Series Hiroshi Sakaba and Others ........................................................... 24■ Servo Systems Division

Servo Technology for Protecting People

Hideaki Kodama and Others ................................ 31

Development of the SANMOTION F Series
56 mm sq. 2-Phase 1.8° Stepping Motors Shogo Yoda and Others ...................................... 36

Aiming to Develop Technology
for Protecting People
Keiichi Kitamura Executive Operating Ofﬁcer

In recent years, more and more products and information have become
available and accessible to people, and our lives have become much moreconvenient. On the other hand, environmental problems keep emerging suchas global warming and air pollution caused by the large-scale use of fossil
energy and ocean pollution caused by plastic waste.
Against such a backdrop, organizations all over the world have launchedinitiatives aimed at protecting people and environments. Such examples
include: Sustainable Development Goals (SDGs) defining 17 goals to beachieved by 2030; RE100, an initiative committed to shifting the electricity
used in business activities to 100% renewable energy by individually set
deadlines; EP100, an initiative to have more than 100 companies all over theworld improve their energy efficiency by 50% by 2030.
Under our corporate philosophy of “aiming to help all people achieve
happiness,” we focus on three technology topics in developing our products:
technology for protecting the global environment, technology for using newenergy sources and saving energy, and technology for protecting people’s
health and safety. These technologies have a deep connection with technology
for protecting people.
1. Promoting the use of renewable energy
One of our goals is to develop products that promote the use of renewableenergy, including solar power, wind power, and biomass, to protect people
from worsening conditions in living environments caused by global warming
and environmental pollution. This aligns with one of the SDGs of “affordable
and clean energy.”
For example, our power conditioners (renewable energy inverters) canefficiently convert power generated through photovoltaic power generation,wind power generation, hydroelectric power generation, and other forms ofrenewable energy into usable electricity, delivering clean energy to people allover the world. We will continue to develop a variety of power conditioners
that make use of renewable energy. In addition to promoting the use ofrenewable energy through product development, we also aim to increase theratio of renewable energy used to power our production factories.

1

SANYO DENKI Technical Report No.52 November 2021

2. Promoting energy conservation
Initiatives to save energy have become crucial in providing everyone withenergy and protecting our living environments. In addition to developing ecoefficient products capable of high performance with less energy, we also aim
to manufacture products in a way that reduces the amount of waste generated
during production processes, reuses and recycles our products, and makes
use of environmentally-friendly materials to bring our energy conservation
efforts to the next level. We also continue to engage in initiatives to reduce theamount of energy used in our production processes. For example, we reduce
the amount of energy required for production by designing products that canbe manufactured more easily and by building efficient production lines.
3. Protecting people’s lives and livelihoods from natural disasters
Power is crucial in protecting the lives and livelihoods of people during anatural disaster. Our power generation vehicles have been used to provide
power in the event of a natural disaster. Our blowers have been used in
the suction of smoke detection systems to prevent fires, and our stepping
systems can be found in equipment that secures water in regions experiencing
droughts. We will continue to develop highly reliable products that can berelied on not only to maintain our daily lives, but also in times of emergency.
4. Protecting people’s health and safety
The products from our company’s three business divisions can be foundin many kinds of electrical equipment and the machines that produces theelectrical equipment, playing important roles in ensuring the health and safetyof people.
For example, several of our products can be found in a CT scanner. Our
servo systems are used to drive its patient table, our fans are used to coolinternals, and our UPSs are used as power backup. For production equipment,
the safety functions of our servo amplifiers are used to control industrial
robots, playing a role in protecting people’s safety.
We will continue to provide products that have technology best suited toour customers’ electrical equipment and production equipment, aiming at
manufacturing that protects people’s health and safety at a higher level.

SANYO DENKI Technical Report No.52 November 2021

2

Feature: Technology for Protecting People

Cooling Technology
for Protecting People
Toshiyuki Nakamura

1. Introduction
In recent years, advances in computers and communicationpressure, and low power consumption, Our 40 × 40 mm fansare used in these applications, due to their high airflow, highstatic pressure, and reduced power consumption.

networks have made many electronic devices and information
processing devices crucial to our daily lives. Fans are installedin these devices to dissipate heat. Our cooling fans offer bestin-class performance, long service life, and high reliability,
and therefore they are used all over the world for a wide range
of applications including ICT—5G base stations, servers, anddata centers—and medical equipment and the energy field to
support our daily lives and public infrastructure.
Moving forward, the more digitized society becomes, themore markets requiring cooling fans will increase as more
devices are switched to electronic control. There will be
growing demand to provide these fans with high performanceat a smaller size.
This article introduces cooling technology using coolingfans that can be found in our daily lives.

Fig. 1 Rack mount server example(Photo provided by Super Micro Computer, Inc.)

2. Cooling Technology
in Our Daily LivesPower
supply2.1 Technology that improves the ICT field
Due to the faster 5G c om mu n ication speeds a nd

CPU
Fan

expanded cloud services, the processing speed and amount

Memoryof data processed by today’s servers are increasing,
generating more heat. The density of components inside

HDD

equipment has also been increasing, and therefore thecooling fans that cool such equipment are required to havehigh airflow and high static pressure performance.

Fig. 2 1U server example(Photo provided by Super Micro Computer, Inc.)

To improve the aerodynamic performance, we use fluid
simulations to optimize the shape of fan impellers andframes and use a 3D printer to create and perform prototype
evaluations. We also use 3-phase motors and strong magnets

3

2.2 Technology that improves the medical
field

in drive circuits to increase the efficiency, resulting in highIn the medical field, more and more diagnosis devices are

airflow, high static pressure, and low power consumption.

becoming digitized and high performance. Fans are used to

Figure 1 shows a rack-mount server, and Figure 2 shows a 1U

cool the inside of these devices. Medical devices are used inserver. These applications require high airflow, high static

quiet locations, and therefore quietness and high reliability

SANYO DENKI Technical Report No.52 November 2021

Cooling Technology for Protecting People

are required.
In addition to carefully designing the shapes of fan
impellers and frames, we reduced the electromagnetic

3. Cooling Technology
for Future Society

switching noise generated from the motor for use in

As more and more devices are digitized, equipment

quiet environments. Figure 3 shows ultrasonic diagnostic

cooling has become a major issue as more and more devices,

equipment and Figure 4 shows a medical monitor forincluding ICT equipment, are controlled electronically.

displaying x-ray images, where Our Silent Fans are used in

Cooling fans with even better performance will be neededboth devices.

to resolve this issue. At the same time, manufacturers
required to have their technology and products comply
with Sustainable Development Goals (SDGs), which are
initiatives aimed at protecting the environment. Of the
17 SDGs, the two that apply here are Goal 7 “Affordable
and clean energy” and Goal 13 “Climate action.”
Also, IoT-based remote control and status monitoring ofcooling fans have been increasingly required to increase thesafety of equipment. The following sections introduce ourtechnology that can meet these needs.

Fig. 3 Ultrasonic diagnostic equipment example

3.1 Technology that helps develop
the energy field
Cooling technology plays an important role in resolving
the issue of heat generated in equipment that converts
sunlight, wind power, water power, and hydrogen fuel into
electric energy. This equipment is mainly installed outdoors,and should therefore provide environmental durability(water and temperature resistance) and should not requireFig. 4 Medical monitor example

service or maintenance over long-term use. High airflow
and high static pressure cooling fans that are waterproof,
temperature-resistant, and long lasting would therefore play

Figure 5 shows a CT scanner. Our G Proof Fans are usedin this application to cool the X-ray generating portion thata role in increasing the performance of energy conversion
equipment.

rotates at high speed. The X-ray generating part rotates

Figure 6 shows an example where Splash Proof Fans areat high speed and generates a high level of G-force, so theused to cool the inside of an inverter in a PV generation

cooling fan used in the equipment must be operable in highsystem. Figure 7 illustrates our Long Life Splash Proof Fans

G-force environments. We achieved a G-force tolerance

used to cool the inside of an EV quick charger. In this way,of 75 G by revising the materials used and newly designing

environmental durability technology contributes to the

fan shape and parts-mounting method based on strength

energy field.

analysis simulation data.

Fig. 6 PV generation system example
Fig. 5 CT scanner example

SANYO DENKI Technical Report No.52 November 2021

4

64.68 W

5

Current model
9A0912G401

3.2 Technology that helps saving energy
and CO2 emissions
When developing a cooling fan product, achieving higher
airflow, higher static pressure, and longer life can reduce thespace required for installation and the frequency of required
maintenance, helping conserve resources.

Static pressure [Pa]Fig. 7 EV quick charger example
80

3

2

40

1

Cooling fans can be made more eco efficient by improving
the aerodynamic performance and increasing the motor

2.64 W

New model
9RA0912G4001

60

Power consumption [W]4

44% reduction

Current model
9A0912G401

200efficiency to reduce the amount of power consumed while
operating. Also, PWM control can also be used to add speed
control functionality. This can be used to easily control the

0

0

0.4

rotational speed of the cooling fan based on the amountof heat generated by the equipment, helping reduce power
consumption.

0.8
1.2
Airflow [m3/min]

1.6

2

Fig. 8 Comparison of the new product San Ace 92
9RA type and an existing productFigure 8 shows that a new product, San Ace 92 9RA
type, has a reduced power consumption. The new productconsumes 44% less power than an existing product while

Equipment

maintaining the airflow vs. static pressure characteristics.
For details, refer to an article on this in this Technical
Report.

External I/O(Cloud server)

Controller

Fans

3.3 Preventive maintenance

Wireless
communication

The needs for IoT-based control of cooling fans can be
met by San Ace Controller, which can remotely control
configuration of San Ace Controller. With this product, theSet/Control/
Monitorstatus of cooling fans installed in areas that are difficult

Data/Alarm

users to create a maintenance plan based on the status.

Internet

LANand monitor fans. Figure 9 shows an example system

to service and maintain can be monitored, allowing

DevicesDC power supplyPC

Sensors

This controller can also be used with various sensors toautomatically control cooling fans and efficiently cool orventilate based on the status of equipment.

5

SANYO DENKI Technical Report No.52 November 2021

Fig. 9 San Ace Controller system configuration

Cooling Technology for Protecting People

Items used for monitoring can be set freely by the user.

Author

If measurement values deviate from these setting values,
the user will be notified of the error via email, web browser

Toshiyuki Nakamura

screen notification, LED indicator on the main unit, orDesign Dept., Cooling Systems Div.
Works on the development and design of cooling fans.

external output. The measurement data and alarm history
are stored in internal memory and can be viewed on the webbrowser screen. Data can then be used to analyze equipment
failure and develop new products, which can help makeequipment safer and more secure.

4. Conclusion
This article introduced cooling fan technology that
improves our daily lives and cooling technology that cancontribute to future society.
Equipment has increasingly been controlled electronically.
Improvements in cooling fan technology will help increase
equipment performance, reduce energy consumption, andreduce the use of resources, contributing to protecting
people’s daily lives and the global environment.
To develop and provide products that protect people,
we will continue to help our customers resolve issues andprovide the best products for them.
References(1) Hiromitsu Kuribayashi: “Cooling Systems Specialty Technologies”
SANYO DENKI Technical Report, No.48, pp.3–7 (2019.11)(2) SuperRack® Solutions by Super Micro Computer, Inc.
https://mysupermicro.supermicro.com(3) SuperServer 1029U-E1CR4 by Super Micro Computer, Inc.
https://mysupermicro.supermicro.com(4) Naoki Murakami and 7 others: “Development of San AceController, an IoT Product for Remote Fan Control and Monitoring”
SANYO DENKI Technical Report, No.48, pp.8–13 (2019.11)

SANYO DENKI Technical Report No.52 November 2021

6

New Product Introduction

ø172 × 150 × 51 mm San Ace 172AD 9AD Type
ACDC Fan and San Ace 172AD 9ADW Type
Splash Proof ACDC Fan
Naoya Ozumi

Naoki Murakami

Takashi Kawashima

Masato Murata

Koji Ueno

1. Introduction
AC-powered cooling fans are used in many applications,
including air conditioners, inverters, and control panels.
Re, there has been a growing need for reduced power
consumption of devices in recent years. AC-powered fanshave also been required to have a wider input voltage
range for global use and water protection for use in moreenvironments. We had offered the ø172 × 150 × 51 mm San
Ace 172 AC Fan (hereinafter, “current model”), but a new
AC-powered fan that could meet these requirements had
been needed.

Fig. 1 ø172 × 150 × 51 mm San Ace 172AD 9AD typeIn response, we developed San Ace 172AD 9AD type
ACDC Fan, which features DC fan-level low power
consumption despite its wide AC input voltage range, and
San Ace 172AD 9ADW type Splash Proof ACDC Fan(hereinafter, “new models”).
This article will introduce the performance and featuresof the new models as well as key points of development.

2. Product Features
Figures 1 and 2 show the appearance of the new products.
Figure 1 shows the appearance of the 9AD type, while
Figure 2 is of the 9ADW type.

Fig. 2 ø172 ×150 × 51 mm San Ace 172AD 9ADW typeThe features of the new products are as follows:(1) Low power consumption(2) High airflow and high static pressure(3) Wide range of AC input supported* IP56-rated protection
The IP Code, or Ingress Protection Code is definedby International Electrotechnical Commission (IEC) in the IEC
60529 standard “Degrees of Protection Provided by Enclosures(IP Code)” (IEC 60529:2001).

The 9ADW type also offers the following feature in
addition to the above:(4) IP56-rated* dust and water protection

3. Product Overview
3.1 Dimensions
Figures 3 and 4 show the dimensions of the new models.
The new models are compatible in size and mounting withthe current model.

7

SANYO DENKI Technical Report No.52 November 2021

AD
ø172 × 150 × 51 mm San Ace 172AD 9AD Type ACDC Fan and San Ace 172AD 9ADW Type Splash Proof ACDC Fan

M4×0.7 Depth 68-ø4.5±0.3
Mounting hole150±0.851±0.87.5±0.4

+30
0

（10）

ø162±0.5ø172±0.8300

7.5±0.4

Input leads
AWG 22
UL 11347
Other leads
AWG 24
UL 1430

ADW

55

.5˚

Rotating direction

.5˚

55

Airflow direction

Fig. 3 Dimensions of the San Ace 172AD 9AD type (Unit: mm)

M4×0.7 Depth 68-ø4.5±0.3
Mounting hole
+30
300 0
（10）

7.5±0.4

51±0.87.5±0.4（240）ø162±0.5ø172±0.8

150±0.8

Input leads
AWG 22
UL 11347

図版の文字

123

Other leads
AWG 24
UL 1430

英語版用

Condens

55

.5˚

英語版用

.5˚

55

Times Ten
Airflow direction

Rotating direction

Fig. 4 Dimensions of the San Ace 172AD 9ADW type (Unit: mm)

3.2 Specifications
3.2.1 General specifications
Table 1 shows the general specifications of the newmodels. Both the 9AD type and 9ADW type share the samegeneral specifications.

Table 1 General specifications of new models
Model no.

9AD5701P5H003
9ADW5701P5H003

Rated
Frequency
voltage
[Hz]
[V]
100
to
240

50/60

PWM
duty
cycle
[%]

Rated Rated Rated
Max. airﬂow
current input speed
図版の文字
-1
[A]
[W] [min123] [m3/min] [CFM]

100

0.3

17

3800
Condens 6.7

0

0.08

3.2

1500
Times Ten2.64

英語版用

英語版用

236
93

Sound
OperatingExpectedpressure temperature
life
level
range
[h]
[Pa] [inchH2O] [dB(A)]
[°C]
40000
195
0.78
54
-20
at 60°C
to(70000
+70
40
0.16
31
at 40°C)
Max. staticpressure* Input PWM frequency: 25 kHz
Note: The expected life at an ambient temperature of 40°C is for reference purposes only.

SANYO DENKI Technical Report No.52 November 2021

8

4. Key Points of Development

3.2.2 Airflow vs. static pressure
characteristics
F i g u r e 5 s h ow s t h e a i r f l ow v s . s t a t i c p r e s s u r eCompared to the current model, the new models achieve

characteristics for the new models. The airflow vs. static

lower power consumption, higher airflow, and higher staticpressure characteristics do not change over the input voltagepressure with the size unchanged. In addition, the 9ADW

range of 100 to 240 V.

type also provides dust and water protection.
The key points of development are explained as follows.

（inch H2O） （Pa）

1.0

250
100% PWM
duty cycle

Static pressure

0.8

0.6

Voltage: 100 to 240 VAC
Frequency: 50/60 Hz

4.1 Impeller and frame design
Figure 6 compares the shapes of the impellers and frames
for the current and new models.

200

When redesigned the impeller and frame by conducting
nu merous si mu lat ions for va r ious c ombi nat ions of

50% PWM
duty cycle

150

parameters such as the number, length, and angle of blades,
and the shape of the frame, and by prototype testing. In

0.4

100

0.2

50

this way, we determined the design for optimized airflow

0% PWM
duty cycle

performance.

4.2 Circuit design
We designed the new models to be compatible with a wider 100
to 240 VAC voltage range, improved the efficiency of the AC-

0

0

2.5
0

7.5（m3/min）

5.0
100

200

（CFM）

Airflow

Fig. 5 Airflow vs. static pressure characteristicsof new models

DC conversion circuit to reduce power consumption, andoptimized the motor-driving DC voltage. We encounteredan issue with the 9ADW type where the temperature of
PCB and electronic components would rise due to the PCB
being sealed in an enclosure. We managed to suppress thetemperature rise with a structure such that the heat fromelectronic components would dissipate through the frame.

3.2.3 PWM control function
The new models have PWM control function and arecapable of controlling fan speed.

4.3 Water-resistant design
Figure 7 shows the appearance of the live part of newmodels. We provided the 9ADW type with IP56-rated

3.3 Expected life

housing the circuit in the space between the frame and

60°C (survival rate of 90%, run continuously at rated voltage

cover. We also reduced the amount of resin in the coating toin free air and at normal humidity). The expected life of themake the product lighter.

current model is 25,000 hours under the same conditions, so
the expected life of the new models is 1.6 times longer thanthe current model.

9

dust and water protection by coating its motor in resin and

The new models have an expected life of 40,000 hours at

SANYO DENKI Technical Report No.52 November 2021

ø172 × 150 × 51 mm San Ace 172AD 9AD Type ACDC Fan and San Ace 172AD 9ADW Type Splash Proof ACDC Fan

5. Comparison of New and Current
Models
5.1 Comparison of airflow
vs. static pressure characteristics
Figu re 8 compares the ai r f low vs. static pressu recharacteristics of the new and current models. The newmodels have 3% higher maximum airflow than the current
model while maintaining the same ma x imu m staticpressure. On the estimated system impedance (ventilation
resistance) curve in the figure, the operating airflow of the
new models is 27% higher than the current model.
220
Voltage: 100 VAC
Frequency: 60 Hz

200
180

27% UP

160

Current modelFig. 6 Shape comparison between the newand current models

Resin motor coating

Static pressure [Pa]New model

New models
9AD5701P5H003
9ADW5701P5H003
Current model
109S301

140
120
100
80
60

Estimated system
impedance

40
20

Cover

3% UP

0
1

2

3

4
5
Airflow [m3/min]

6

7

Fig. 8 Airflow vs. static pressure characteristicsof the new and current models
Control circuit housed in the space
between frame and coverFig. 7 Appearance of the live part

5.2 Comparison of power consumption
at an equivalent performance level
as the current model
Figures 9 and 10 compare power consumption of thecurrent and new models at equivalent cooling performance.
The figures show that power consumption drops 48% at
60 Hz and 58% at 50 Hz compared to the current model when
the speeds of the new models are reduced with PWM control
to match the cooling performance of the current model.

SANYO DENKI Technical Report No.52 November 2021

10ø172 × 150 × 51 mm San Ace 172AD 9AD Type ACDC Fan and San Ace 172AD 9ADW Type Splash Proof ACDC Fan

400

6. Conclusion

40
New models
9AD5701P5H003
9ADW5701P5H003
Current model
109S301

Voltage: 100 VAC
Frequency: 60 Hz

360
320

36

T h is a r ticle i ntroduced some of the featu res a nd
performance of the San Ace 172AD 9AD type ACDC Fan

32

280

28

240

24

48% reduction
200

20

160

16

120

12

80

8

40

Fan.
The new models achieved lower power consumption,
Power [W]

Static pressure [Pa]and the San Ace 172AD 9ADW type Splash Proof ACDC

higher airflow, and higher static pressure without changing
the size of the current model. They can be used in a wider
range of applications with a wider input voltage range andthe 9ADW type’s dust and water protection.
We will continue providing products that can meet market
needs to help our customers create new value.

4

Author0

Naoya Ozumi

Operating point
0

1

2

3
4
5
Airflow [m3/min]

6

7

Fig. 9 Power consumption comparison between
new and current models (100 V, 60 Hz)

Design Dept., Cooling Systems Div.
Works on the development and design of cooling fans.

Naoki Murakami
400

40

320

New models
9AD5701P5H003
9ADW5701P5H003

36

Current model
109S301

32

280

28

240

24

58% reduction

200

20

Koji Ueno
Design Dept., Cooling Systems Div.
Works on the development and design of cooling fans.

Takashi Kawashima
Power [W]

Voltage: 100 VAC
Frequency: 60 Hz

360

Static pressure [Pa]Design Dept., Cooling Systems Div.
Works on the development and design of cooling fans.

160

16

Masato Murata

120

12

Design Dept., Cooling Systems Div.
Works on the development and design of cooling fans.

80

8Operating point

40
0

4

1

2

3

4
5
Airflow [m3/min]

6

7

0

Fig. 10 Power consumption comparison between
new and current models (100 V, 50 Hz)

11

Design Dept., Cooling Systems Div.
Works on the development and design of cooling fans.

SANYO DENKI Technical Report No.52 November 2021

New Product Introduction

Development of Low Noise Fans
San Ace 60, San Ace 80, San Ace 92,
and San Ace 120 9RA TypeRyo Shimizu

Haruhisa Maruyama

Hayato Murayama

Naoya Inada

Ken Takayama

Akira Nakayama

Rogen Molino

Jane Oliva

Michelle Alcantara

Nerissa Quiroz

Gernan Noval

Tetsuya Yamazaki

Masaki Kodama

1. Introduction
In recent years, measuring devices, amusement devices,
medical equipment, and AV devices have become morecompact and higher performance. As a result, these devices
are generating more heat, requiring more effective coolingfans. At the same time, as these devices are often used nearpeople, cooling fans for them are required to operate quietly.
To meet such market demands, we developed and launched
the new San Ace 60, San Ace 80, San Ace 92, and San Ace

Fig. 2 80 × 80 × 25 mm San Ace 80 9RA type

120 9RA type Low Noise Fans (hereinafter, “new models”).
This article will introduce the features and performance ofthe new models.

2. Product Features
Figures 1 through 4 show the appearance of the newmodels.
The new models generate less noise, consume less power,
and offer longer service life while maintaining the size andcooling performance compared to our current models—9R

Fig. 3 92 × 92 × 25 mm San Ace 92 9RA type

type for 60 × 60 × 25 mm and 80 × 80 × 25 mm, 9A type for 92
× 92 × 25 mm, and 9G type for 120 × 120 × 25 mm.

Fig. 1 60 × 60 × 25 mm San Ace 60 9RA typeFig. 4 120 × 120 × 25 mm San Ace 120 9RA type

SANYO DENKI Technical Report No.52 November 2021

12

図5

3. Product Overview

The new models come in four sizes of 60 × 60 mm, 80
× 80 mm, 92 × 92 mm, and 120 × 120 mm with a depth of

3.1 Dimensions

25 mm shared by all. We have made these size variations

Figure 5 through 8 show the dimensions of the newavailable for customers selection to meet a wide range ofrequirements.

models.
4-ø4.3±0.3
Mounting hole60±0.525±0.550±0.3

(3)

(3)

+50
300 0

50±0.360±0.5

Lead wire
26 AWGUL 10076(10)

Airflow direction

Rotating direction

Fig. 5 Dimensions of the new San Ace 60 (unit: mm)

4-ø4.5±0.3
Mounting hole25±0.580±0.571.5±0.3

(4)

(4)

+50
300 0

71.5±0.3

80±0.5

Lead wire
26 AWGUL 1007(10)

Rotating direction

Fig. 6 Dimensions of the new San Ace 80 (unit: mm)

13

SANYO DENKI Technical Report No.52 November 2021

Airflow direction

Development of Low Noise Fans San Ace 60, San Ace 80, San Ace 92, and San Ace 120 9RA Type4-ø4.5±0.3

92±0.5

Mounting hole82.5±0.3

25±0.5(4)(4)

92±0.582.5±0.3

Lead wire
26 AWGUL 1007
+50
300 0
(10)

図8
Airflow direction

Rotating direction

Fig. 7 Dimensions of the new San Ace 92 (unit: mm)

4-ø4.5±0.3
Mounting hole120±0.8+1
25 0

104.8±0.3(5)(5)

104.8±0.3

120±0.8

Lead wire
24 AWGUL 1007
+50
300 0
(10)

Rotating direction

Airflow direction

Fig. 8 Dimensions of the new San Ace 120 (unit: mm)

3.2 Specifications
3.2.1 General specifications
Table 1 shows the general specifications of the newmodels.

and 120 mm sizes. The new models operate quieter than thecurrent models with the equivalent cooling performance.
There are available in a variety of sizes to allow customers tochoose the one best suited to their equipment.

The lineup is available in 12, 24, and 48 V rated voltage

Also, the new models listed in Table 1 are equipped withvariants for each size for use in a wide range of applications

a PWM control function for fan speed control according toand for replacement of our conventional models.

the temperature within equipment, contributing to energy

Figures 9 through 12 show the airflow vs. static pressuresavings as well as quieter operation.

characteristics of the speed variant models of 12 V rated
voltage model. With all the rated voltage and speed variant
models counted, the lineup includes 10 models for each of
the 60 and 80 mm sizes, and 13 models for each of the 92

SANYO DENKI Technical Report No.52 November 2021

14

Table 1 General specifications of new models
Model no.

Size

9RA0612P4J001
60 × 60
× 25 mm

9RA0624P4J001
9RA0648P4J001
9RA0812P4G001

80 × 80
× 25 mm

9RA0824P4G001
9RA0848P4G001
9RA0912P4G001

92 × 92
× 25 mm

9RA0924P4G001
9RA0948P4G001
9RA1212P4G001
9RA1224P4G001

120 × 120
× 25 mm

9RA1248P4G001

PWM
Rated
Rated Rated Rated
Max. airflow
duty
voltagecurrent input speed
cycle*[V][A][W] [min-1] [m3/min] [CFM]
[%]
100
0.35
4.2
7,700
1.1
38.8
12
30
0.05
0.6
1,900
0.27
9.5
100
0.18
4.32 7,700
1.1
38.8
24
20
0.03
0.72 1,700
0.24
8.5
100
0.1
4.8
7,700
1.1
38.8
48
20
0.03
1.44 1,800
0.25
8.8
100
0.22
2.64 5,000
1.4
49.4
12
30
0.03
0.36 1,100
0.3
10.6
100
0.11
2.64 5,000
1.4
49.4
24
20
0.02
0.48 1,000
0.28
9.8
100
0.07
3.36 5,000
1.4
49.4
48
20
0.02
0.96 1,700
0.47
16.5
100
0.22
2.64 4,200
1.8
63.5
12
30
0.03
0.36 1,000
0.42
14.8
100
0.13
3.12 4,200
1.8
63.5
24
20
0.03
0.72 1,000
0.42
14.8
100
0.07
3.36 4,200
1.8
63.5
48
20
0.03
1.44 1,400
0.6
21.2
100
0.55
6.6
4,500
3.68 1301220
0.06
0.72 1,250
1.02
36
100
0.28
6.72 4,500
3.68 130
24
20
0.05
1.2
1,750
1.43
50.5
100
0.15
7.2
4,500
3.68 13048
20
0.03
1.44 1,650
1.34
47.3

図9* Input PWM frequency: 25 kHz. Speed is 0 min at 0% PWM duty cycle.図10

Max. staticpressure[Pa] [inchH2O]
130
8.1
130
6.5
130
7.1
83
4
83
3.3
83
9.6
73.5
4.1
73.5
4.1
73.5
8.1
120
9.2
120
18.1
120
16.1

0.52
0.03
0.52
0.02
0.52
0.03
0.33
0.01
0.33
0.01
0.33
0.04
0.29
0.016
0.29
0.016
0.29
0.033
0.48
0.037
0.48
0.073
0.48
0.065

Sound
OperatingExpectedpressure temperature
life
level
range
[h]
[dB(A)]
[°C]
41
13
41
11
41
12
37
11
37
10
37
60,00014
at 60°C-20 to +70(90,00037
at 40°C)
11
37
11
37
14
47
15
47
22
47
21

-1

Note: The expected life at an ambient temperature of 40°C is for reference purposes only.

150

100
Voltage: 12 V

Voltage: 12 V
9RA0812G4001

9RA0612J4001

80

7,700 min-1, 41 dB(A)9RA0812S4001

9RA0612G4001
5,600 min-1, 36 dB(A)3,900 min-1, 31 dB(A)Static pressure [Pa]Static pressure [Pa]120

5,000 min-1, 37 dB(A)90
9RA0612S4001
4,600 min-1, 30 dB(A)6060
9RA0812H4001
3,300 min-1, 27 dB(A)9RA0812M4001
2,650 min-1, 22 dB(A)40

9RA0612H4001
3,800 min-1, 26 dB(A)
30

0

20

0

0.3

0.6

0.9

1.2

1.5

Airflow [m3/min]Fig. 9 Airflow vs. static pressure characteristicsof the new San Ace 60

15

SANYO DENKI Technical Report No.52 November 2021

0

0

0.3

0.6

0.9

1.2

1.5

Airflow [m3/min]Fig. 10 Airflow vs. static pressure characteristicsof the new San Ace 80

図11Development of Low Noise Fans San Ace 60, San Ace 80, San Ace 92, and San Ace 120 9RA Type

4. Key Points of Development

100
Voltage: 12 V

The new models, when compared to the current models,

9RA0912G4001

achieve lower noise, lower power consumption, and longer

4,200 min-1, 37 dB(A)80service life with cooling performance maintained.

9RA0912S4001

The key points of development are explained below.

Static pressure [Pa]3,850 min-1, 35 dB(A)9RA0912H4001
60

4.1 Motor and circuit

3,400 min-1, 31 dB(A)We used highly efficient compact motors for the new 60 ×

9RA0912F4001
2,850 min-1, 27 dB(A)60 mm and 120 × 120 mm models. We also designed a newcircuit and changed the drive system for the new models

9RA0912M4001
2,450 min-1, 23 dB(A)40including the 80 × 80 mm and 92 × 92 mm models, reducing
the power consumption from the current models.
This drive system change also reduced the heat generation
inside the fan by the motor and electronic components,

20

which suppressed the temperature rise in bearings, resulting
in longer fan service life compared with the current models.
0
0

0.4

0.8

1.2

1.6

2

Airflow [m /min]3

図Fig.12
11 Airflow vs. static pressure characteristicsof the new San Ace 92

4.2 Impeller and frame
Figure 13 compares the shape of fan impellers and framesof the current and new models, using the San Ace 60 as an
example.
We used compact motors in the new models to increase
the design flexibility for the impeller. This allowed us to do

140

simulations with increased the number of conditions, such as
Voltage: 12 V

impeller shape and blade installation angle. We conductedsimulations and actual evaluations combining various frame

9RA1212G4001

120

shapes and numbers of spokes so that we could determine

4,500 min-1, 47 dB(A)the ideal shape.
9RA1212E4001

100
Static pressure [Pa]4,000 min-1, 45 dB(A)9RA1212A4001

80

3,500 min-1, 42 dB(A)60

9RA1212H4001
3,200 min-1, 39 dB(A)40

9RA1212M4001
2,200 min-1, 28 dB(A)

20

0
0

1

2

3

4

5

Airflow [m3/min]Fig. 12 Airflow vs. static pressure characteristicsof the new San Ace 120
New model

Current modelFig. 13 Shape comparison between the newand current San Ace 60 models

SANYO DENKI Technical Report No.52 November 2021

16

5. Comparison of New and Current
Modelsreductions, a 3 dB (A) reduction for the 60 × 60 mm and 80

5.1 Comparison of the airflow vs. staticpressure characteristics and noise levels
between new and current models

means that the noise level from two units of a new model in× 80 mm models and 4 dB(A) reduction for the 92 × 92 mm
and 120 × 120 mm models. A 3 dB(A) difference in noise
operation is equal to that from one unit of a current model inoperation.

Figures 14 through 17 compare the airflow vs. staticpressure vs. power consumption characteristics and the

5.2 Comparison of expected life

noise level characteristics of the fastest new and current

The new models have an expected life of 60,000 hours at

models for each size. The figures show that the new models

60°C (survival rate of 90%, run continuously at rated voltage

consume 26% to 44% less power while maintaining theand normal humidity in free air). The expected life of the

airflow vs. static pressure characteristics compared to thecurrent models is from 30,000 to 40,000 hours, so the new

current models. The figures also show significant noise
図14
図models
15 have 1.5 to 2 times longer expected lives.

55

55

Voltage: 12 V

Current model
109R0612J401

50

3 dB(A)
reduction45

New model
9RA0612J4001

Voltage: 12 V

Current model
109R0812G401

50
SPL [dB(A)]

3 dB(A)
reduction

45
40 New model
9RA0812G4001
35
30

40
6

120

3

80

2

0

1

Current model
109R0612J401

0

0.2

0.4

0.6

0.8

1

1.2

Current model
109R0812G401

100
Static pressure [Pa]New model
9RA0612J4001

Power consumption [W]Static pressure [Pa]

4

4.2 W

4

41%
reduction

80

3
New model
9RA0812G4001

60

2.64 W

2

40

1
Current model
109R0812G401

20

0

0

0

0.4

0.8

1.2

Airflow [m3/min]

Airflow [m3/min]Fig. 14 Comparison of the newand current San Ace 60 models

Fig. 15 Comparison of the newand current San Ace 80 models

SANYO DENKI Technical Report No.52 November 2021

54.44 W

5

160

40

17

5.64 W

26%
reduction

Current model
109R0612J4016

1.6Power consumption [W]

SPL [dB(A)]

60

図17

図16

Development of Low Noise Fans San Ace 60, San Ace 80, San Ace 92, and San Ace 120 9RA Type55

SPL [dB(A)]

4 dB(A)
reduction

45
40

New model
9RA0912G4001

35

Voltage: 12 V
Current model
9G1212G401

55
50
New model
9RA1212G4001

45
40

30
6

4.68 W4

2.64 W

2

40

1

Static pressure [Pa]New model
9RA0912G4001

60

120

Current model
9A0912G401

0

New model
9RA1212G4001

100

1.2

1.6

2

0

80
60
Current model
9G1212G401

20
0

0.8

0

0.5

1

1.5

2

2.5

3

3.5

Airflow [m /min]

Airflow [m /min]Fig. 16 Comparison of the newand current San Ace 92 models

Fig. 17 Comparison of the newand current San Ace 120 models

4

3

3

6. Conclusion

4

6.6 W

40

0.4

8

40% reduction
44%
reduction

3

0

12

10.8 W

5

80

20

16

Current model
9G1212G401

Power consumption [W]Static pressure [Pa]Current model
9A0912G401

0

4 dB(A)
reduction

Power consumption [W]

SPL [dB(A)]50

60

Voltage: 12 V

Current model
9A0912G401

amusement devices, medical equipment, and AV devices
that are used nearby people.

This article introduced the features and performance ofThe new models offer a longer expected life than thethe San Ace 60, San Ace 80, San Ace 92, and San Ace 120

current models, and we believe that this will help increase

9RA type Low Noise Fans.

the maintainability and extend the expected life of

T he new mo del s ach ieve lower noi se a nd p ower

equipment.

consumption while maintaining the cooling performance

We will continue developing products quickly responding

compared to the current models. We believe that these fansto and meeting market needs to provide products that canwill help reduce noise and save energy in measuring devices,help our customers create new value.

SANYO DENKI Technical Report No.52 November 2021

18

Development of Low Noise Fans San Ace 60, San Ace 80, San Ace 92, and San Ace 120 9RA Type

AuthorRyo Shimizu

Rogen Molino

Design Dept., Cooling Systems Div.
Works on the development and design of cooling fans.

Design Dept., SANYO DENKI PHILIPPINES, INC.
Works on the development and design of cooling fans.

Haruhisa Maruyama

Jane Oliva

Design Dept., Cooling Systems Div.
Works on the development and design of cooling fans.

Design Dept., SANYO DENKI PHILIPPINES, INC.
Works on the development and design of cooling fans.

Hayato Murayama

Michelle Alcantara

Design Dept., Cooling Systems Div.
Works on the development and design of cooling fans.

Design Dept., SANYO DENKI PHILIPPINES, INC.
Works on the development and design of cooling fans.

Naoya Inada

Nerissa Quiroz

Design Dept., Cooling Systems Div.
Works on the development and design of cooling fans.

Design Dept., SANYO DENKI PHILIPPINES, INC.
Works on the development and design of cooling fans.

Masaki Kodama

Gernan Noval

Design Dept., Cooling Systems Div.
Works on the development and design of cooling fans.

Design Dept., SANYO DENKI PHILIPPINES, INC.
Works on the development and design of cooling fans.

Ken Takayama

Tetsuya Yamazaki

Design Dept., Cooling Systems Div.
Works on the development and design of cooling fans.

Design Dept., SANYO DENKI PHILIPPINES, INC.
Works on the development and design of cooling fans.

Akira Nakayama
Design Dept., Cooling Systems Div.
Works on the development and design of cooling fans.

19

SANYO DENKI Technical Report No.52 November 2021

Feature: Technology for Protecting People

Power Technology
for Protecting People
Akira Miura

1. Introduction

vital infrastructure (such as railroads, harbors, and airports).
We have developed, based on the SANUPS N11B-Li

There have been frequent natural disasters in recent years

UPS equipped with lithium-ion batteries for outdoor use,that threaten the safety of people. The frequency of thesea custom UPS that can be used in Fundamental Plan fordisasters is expected to increase in the furure. The major

National Resilience projects with compliance with “Outdoor

natural disasters that have occurred in Japan since 2018 are

Uninterruptible Power Supply Device Specifications”(2)listed below.

defined by Japan’s Ministry of Land, Infrastructure,(1)

Transport and Tourism.
This product differs from our standard specifications in• 2018:

Torrential rains in West Japan in July

• 2019:Typhoon No. 15 (Boso Peninsula)several points: we revised the storage battery layout and• 2019:Typhoon No. 19 (East Japan)

circuit so that power backup can be provided for the specified
time in -20˚C environments; the sheet metal material was

The average annual temperature over land has been highover much of the world, and this is also true throughout Japan.

changed from standard SUS430-KD to SUS304 to improve
resistance to corrosion.

The 2020 deviation from the reference value for average air

Operable in extreme environments, this product is now

temperature in Japan (30-year average from 1991 to 2020)

used as power backup for surveillance cameras and display

was the highest since statistics began being recorded in 1898.

devices that maintain infrastructure such as roads, rivers,

Experts have indicated a strong link between the increase inports, and water and sewerage systems.

natural disasters and global warming.
In October 2020, the Japanese government announced its
goal of becoming “carbon neutral” by 2050, which means
essentially zero emissions of greenhouse gases, setting a goal ofincreasing the use of renewable energy to around 50% to 60%.

This product contributes to enhancing the emergency
preparedness of public infrastructure, keeping people safe
from increasingly severe natural disasters.
Figure 1 shows the appearance of the SANUPS N11B-Li,
while Table 1 provides its product specifications.

This article introduces some of our Power Systems products:
products that protect people from increasingly severe andfrequent natural disasters, products that protect people during
power outages caused by natural disasters, and products that
promote carbon neutrality and protect people from global
warming.

2. Outdoor UPS SANUPS N11B-Li
In December 2020, the Japanese government made acabinet decision on the “Five-year Acceleration Plan toPrevent and Mitigate Disasters, and Improve National
Resilience.” Since then, the government has continued toModel: N11BL152AK11TST44HP

Model: N11BL102AK31TST44HP

accelerate plans and initiatives to enhance road network
functionality and to increase emergency preparedness ofFig. 1 SANUPS N11B-Li

SANYO DENKI Technical Report No.52 November 2021

20

Table 1 SANUPS N11B-Li’s ratings eligible for use in MLIT’s “Fundamental Plan for National Resilience” projects
Model no.

N11BL152AK11TST44HP

Load

70 W

Backup time(1)24 hTopology

Passive standby

Transfer time

10 ms or less

Efficiency (AC-AC)

95%

AC input/output

N11BL102AK31TST44HP
140 W

Rated frequency

50/60 Hz (auto-sensing)No. of phases/wires

Single-phase 2-wire

Rated voltage

100/110/120 V

Load power factor

0.8 (lagging)Battery type

Lithium-ion battery

Operating environment

Temperature: -20 to +50°C, humidity: 10 to 90% RH (non-condensing)Protection rating

IP44(2)(1) At a -20°C ambient temperature(2) Standard models come with IP65 protection

2.1 Technology for use in extreme
environments

preventing internal heat from rising in concentrated areas,(1) Use of LIB (lithium-ion batteries)

safely without sacrificing performance or reliability.

enabling us to develop a UPS that can be used outdoors

We used lithium-ion batteries (hereinafter, “LIB”) so thatthe product could be used in extreme environments.
LIBs have high energy density and could cause smoke orfire if used improperly. We ensured the safety of the product3. Emergency Diesel Generator
SANUPS G53A

with dual safety systems: the LIB’s battery management

The supply of quality power is crucial to keep electricalsystem (hereinafter, “BMS”) and the UPS’s LIB status

facilities running normally. The Japanese power grid ismonitoring functionality.

extremely stable and power outages are rare.
However, i f a f i re or la rge- sca le natu ra l d isaster•P rotection by BMS

occurs and the power supply from the power company is

The BMS monitors LIB current, cell voltage, and cellinterrupted, it could prevent emergency equipment fromtemperature, and turns the switch off to disconnect andoperating.

protect the LIB if it detects an error.

The SANUPS G53A generator is compliant with Japan’s
Fire Service Law, which is a mandatory requirement for•P rotection by UPS

building disaster management. With this compliance, it

The UPS communicates with the BMS and monitors

can be used as an emergency power source (for indoor

LIB status during operation. If the UPS detects an error

firefighting equipment and sprinklers) defined in the law

or can no longer communicate with the BMS, it stops

or as a backup power source (for emergency lighting andcharging/discharging to protect the LIB.

smoke ventilation equipment) defined by Japan’s BuildingStandard Law.

(2) High dust and water protection
To operate outdoors safely for a long period of time, theprotects people’s livelihoods as a backup power source to

UPS housing has a sealed structure with IP65-rated dust andallow work to continue and to maintain safety. It also keeps

water protection (in the case of our standard products).

people safe by providing backup power for emergency

In designing the sealed housing, we used thermal fluid

equipment as an emergency power source as defined by the

analysis to simulate the internal heat flow and optimized

Fire Service Law or as a backup power source as defined by

the structure and layout design to effectively circulate andthe Building Standard Law.

discharge internal heat to the outside by using the entire
housing.
This ensured IP65 dust and water protection, while also21

If a fire or large-scale natural disaster occurs, the UPS

SANYO DENKI Technical Report No.52 November 2021

Figure 2 shows the appearance of the SANUPS G53A.

Power Technology for Protecting People

can perform maximum power point tracking control(hereinafter, “MPPT control”) even during the storage
battery charge/discharge or isolated operation, making
maximum use of PV-generated power. It promotes carbon
neutrality and protects people from global warming by
making effective use of PV-generated power.
Figure 3 shows the appearance of the grid-connectedisolated charging type and the grid-connected isolated type,while Figure 4 shows the circuit block diagram for the gridconnected isolated charging type.

Fig. 2 SANUPS G53A

3.1 Technology to comply with Japan’s Fire
Service Law
Compared to a standard generator, the SANUPS G53A
emergency diesel generator has the following additionalfeatures to comply with the Design Requirements for
Emergency Use Engine-driven Power Generators (NEGA
C 311 Standard) defined by the Nippon (Japan) Engine
Generator Association.
• E arthquake-resistant structure for the engine andgenerator• Cubicle materials and structure• Charger compliant with Japan’s Fire Service Law

We also used an engine from a new (to us) manufacturer
and combined it with a newly designed generator.
In designing the engine and generator combination,
we needed to satisfy standard requirements such as
shaft strength versus torsional vibration and dynamic

30 kW grid-connectedisolated charging type

30 kW grid-connectedisolated typeFig. 3 SANUPS P73L

characteristics, while ensuring that the capacity of eachwould not be excessive.
In developing this product, we determined the engine andgenerator combination by using simulations to calculate
the resonance points, stress on the shaft, and engine speed
characteristics when an engine and generator are combined.
We then checked the results of assessing this on actual
equipment. This allowed us to optimize the combination
selection quickly.

4. Power Conditioner (PV Inverter)with Peak Cut Function
SANUPS P73L
The SANUPS P73L power conditioner is capable ofcharging and discharging LIBs.
The grid-connected isolated charging type can be used
as a storage battery system. Thanks to the bi-directional
converter installed in the storage battery input part, it

Fig. 4 Block diagram for grid-connected isolated
charging type

SANYO DENKI Technical Report No.52 November 2021

22

Power Technology for Protecting People

4.1 Technology for making effective useof PV-generated power
M PP T c ont rol c a n not b e p er for me d w it h p ower
conditioners whose storage battery is directly connected tosolar cells because the voltage of the solar cell is fixed to thevoltage of the storage battery, preventing the full use of the
PV-generated power.
The SA NUPS P 73L has a bi-directional converter
installed in the storage battery input part, which allows
it to manage the storage battery charge/discharge while
continuing to perform MPPT control even during thestorage battery charge/discharge. The maximum power ofthe solar cell can therefore always be output, resulting in asignificant increase in power generated.
We also used a non-isolated buck-boost chopper in thebi-directional converter to support a wide range of storage
battery voltages while maintaining high efficiency.
This made it possible to combine storage batteries andsolar cells flexibly, which had conventionally been limitedwith PV inverters that are directly connected to solar cells,
making system design easier.

5. Conclusion
This article introduced several products from Power
Systems Division: products that protect people fromincreasingly severe and frequent natural disasters, productsthat protect people during power outages caused by natural
disasters, and products that promote carbon neutrality andprotect people from global warming.
We will continue to develop products that bring safety topeople’s lives.
References(1) National Resilience Promotion Office, Cabinet Secretariat:“Building National Resilience” pamphlet (version R3.3)
https://www.cas.go.jp/jp/seisaku/kokudo_kyoujinka/pdf/
kokudo_pamphlet_r3.pdf (April 1, 2021)(2) Japan’s Ministry of Land, Infrastructure, Transport and Tourism:“Outdoor Uninterruptible Power Supply Device Specifications”
https://www.mlit.go.jp/tec/it/denki/kikisiyou/touitusiyou_17okug
aimuteidenR0203.pdf (March 2020)

23

SANYO DENKI Technical Report No.52 November 2021

AuthorAkira Miura
Design Dept., Power Systems Div.
Works on the development and design of power supply units.

New Product Introduction

Development of the Small-Capacity
UPS SANUPS E11B-Li and SANUPS
A11M-Li Series
Hiroshi Sakaba

Akihiro Tsukada

Hiroyuki Hanaoka

Kazuya Nishizawa

Yuhei Shoyama

Takuya Ozawa

Hidenori Takizawa

Yuki Takayama

1. Introduction
In recent years, the demand for uninterruptible power
suppl ies (herei na f ter, “U P S”) ha s been i nc rea si ng
throughout the world. One of the reasons for this is because
the spread of mobile devices and IoT-ready equipment has
required more robust power backup systems. As such, there
is a demand for UPSs that can operate in regions inside andoutside Japan with unstable power grids.

Fig. 1 SANUPS E11B-Li 1 kVA modelAlso, UPSs are being used in increasingly diverse
situations, including in extreme temperature environments.
We see this as a market need to address. Conventional
lead-acid batteries can be charged only within a limited
temperature range, and this can be problematic. For
example, in high-temperature environments, these batteries
can be discharged but cannot be charged. Customers haverequested less frequent battery replacement maintenance asmuch as possible and UPSs that are easier to handle during
installation and transportation.
In response, we developed the SANUPS E11B-Li series
and SANUPS A11M-Li series to resolve these issues andmeet these demands. These products make use of lithiumion batteries (hereinafter, “LIB”). This article will provide
an overview of these products.

2. Product Overview
The lineup of S ANU PS E11B-Li series includes fiveFig. 2 SANUPS A11M-Li 8 kVA model(8 units in parallel)

models—1 kVA, 1.5 kVA, and 2 kVA for 100 V; 1 kVA and2 kVA for 200 V—and the lineup of SANUPS A11M-Li series
includes two models—for 100 V and 200 V. Figures 1 and2 show the appearance of typical models of these series.
Products in either series can be mounted in a 19-inch rackand horizontally or vertically on the floor.

SANYO DENKI Technical Report No.52 November 2021

24

3. Features

becomes unstable, the UPS automatically transfers to the

3.1 SANUPS E11B-Li series

done without interruption if the input frequency is within

Double Conversion mode described in (1) above. This isThis product uses a hybrid topology. The hybrid topology
provides two operation modes: high-quality power modethe synchronization range, or there will be an interruption
within 8 ms if it is outside the range.

(Double Conversion mode) and high-efficiency mode

In the Economy mode, it is necessary to immediately(Economy mode; standby topology). These modes can bedetect abnormalities in the grid power. This is ensured byused differently depending on the settings. When the setting

constantly monitoring the input voltage waveform.

is set to Double Conversion mode, the inverter always
supplies high-quality power. When set to automatic, theGrid power

UPS will switch between the Double Conversion mode andOutput power
RectifierEconomy mode depending on the state of the input power,

InverterConverterachieving both high-quality power and energy savings.

Charger(1) Double Conversion mode (High-quality power mode)

Battery

Fig. 4 The power supply pathfor the Economy mode

Figure 3 shows the power supply path for the Double
Conversion mode. First, the grid power is rectified andconverted to a DC voltage. This is then converted by the
inverter to a sinusoidal voltage and output. Therefore,(3) In the event of a power grid failure

even when the grid power fluctuates, the fluctuation is

Figure 5 shows the power supply path during a power

absorbed by the rectifier and inverter, enabling the UPS

grid failure. If grid power causes an interruption or power

to keep supplying high-quality power. The batteries areoutage, the rectifier and charger will be stopped, then the

float-charged by the charger so that they stay charged andconverter will operate to supply power from batteries.

ready for a grid power failure such as a power outage or

If a grid failure occurs during the Double Conversion

voltage dip. If the grid frequency is within the frequency

mode, battery power will be supplied to the load without

synchronization range (within ±1% when set to the Doubleinterruption. If a grid failure occurs during the Economy

Conversion mode; when set to automatic, the range depends

mode, there will be an interruption within 8 ms until batteryon the synchronization range setting), the UPS outputs apower will be supplied.

voltage with a frequency synchronized with the AC input
frequency. If it is outside the range, it outputs a constantfrequency of 50 Hz or 60 Hz and does not synchronize with

Grid power

Output power
Rectifierthe input voltage.

InverterConverter

Charger

Grid power

Battery

Output power
RectifierInverterConverter

ChargerFig. 5 The power supply path
during a power grid failure

Battery

Fig. 3 The power supply pathfor the Double Conversion mode

3.2 SANUPS A11M-Li series(1) System diagram
Up to eight 1 kVA UPS units can be operated in parallel
for increased reliability and expanded capacity. As shown in(2) Economy mode (High-efficiency mode)
Figure 4 shows the power supply path for the Economy

Figure 6, the product consists of up to eight UPS units andone power distribution unit.

mode. When the grid power is stable, the inverter stops,
allowing the grid power to be output as is. This eliminates
the loss through the inverter and increases efficiency.

図版の文字

The batteries are float-charged by the charger so that123

they stay charged and ready for a grid power failure such

英語版用

as a power outage or voltage dip. When the grid power

Condens

英語版用

Times Ten

25

SANYO DENKI Technical Report No.52 November 2021

Development of the Small-Capacity UPS SANUPS E11B-Li and SANUPS A11M-Li Series

Bypass circuit

Filter
RY521

RY523

RectifierF1

F3

FilterBypass breaker
Inverter

RY524

Charger

Boost circuit
Unit interface

Control circuit
F2

EPO
Remote ON/OFF

Battery (LIB)

External interface

PC port（RS-232C or USB）

(Optional card)

Card interface(optional)

External battery connector
UPS Unit 1

UPS Unit 2

UPS Unit 8

AC input

FilterAC output

Filter

Maintenance bypass breaker

Power distribution unit (PDU)

Fig. 6 A11M-Li system diagram(2) Control method

Unit No. 1

The product uses the autonomous control method.
Compared with the central control method and master/

Unit No. 2

slave method, this method allows for independent control
Unit No. 3

of each u n it using each u n it’s control circu it doing
control individually. This ensures high reliability anddisconnectability of units if failure occurs. As shown in

8 kVA

FailureFigure 7, connecting eight units allows power to be supplied
to a maximum load of 8 kVA. When the load capacity is
7 kVA or less, the UPS can have an extra capacity of one unit
for redundancy to maintain operation even if one unit fails.
Unit No. 8

Power supply can be
maintained if the load is
7 kVA or less

Maintenance bypass
Power distribution unit (PDU)

Fig. 7 Parallel redundant operation

SANYO DENKI Technical Report No.52 November 2021

26

3.3 Wide input ranges

3.6 Reduced weight

We designed the SANUPS E11B-Li and SANUPS A11M-

LIBs weigh only one-third of lead-acid batteries, reducing

Li to have wide input voltage and frequency ranges. The

the product weight significantly. This makes the handlingvoltage range is 55 to 150 V for 100 V models and 110 toof the product easier when the product is transported,

300 V for 200 V models, and the frequency range is 40 to

installed, and mounted in a 19-inch rack.

120 Hz. This can reduce the number of transfers to battery
operation even in regions where input power is unstable and3.7 LIB monitoring function

voltage and frequency fluctuate greatly. This means that

The LIB itself provides safety protection functions.

stable power can be supplied to a load while battery wear isWhen a protection function is activated, the LIB shuts

kept minimal.

down the LIB battery circuit. Connection then recovers
automatically once the error is resolved. Following are the

3.4 Wide operating temperature range

major protection functions.

In an ambient temperature of 40˚C or higher, lead-acid•

OCP (over-current protection)batteries can be discharged but cannot be charged. LIBs•

OTP (over-temperature protection)

can be both charged and discharged throughout a wide•

OVP (over-voltage protection)

operating temperature range of -10˚C to +55˚C. They can•

UVP (under-voltage protection)

be used in extremely hot and cold regions, or inside small
unmanned buildings without air-conditioning.

The UPS checks the battery circuit for connection every
24 hours to confirm whether an LIB protection function is

3.5 Reduced maintenance
While our current UPSs that use lead-acid batteries

activated. If an error is confirmed, it outputs a minor failure
alarm.

require battery replacement about every five years, the
UPSs with LIBs allow for operation for roughly ten years(at an ambient temperature of 30˚C) without battery

4. Specifications

replacement. We revised the product service life based(1) Table 1 shows the standard specifications of theon the LIB’s longer battery service life, increasing it fromSANUPS E11B-Li 1 kVA model.

seven years of the current product to 10 years. This reduces
maintenance work and battery replacement costs. Figure 8(2) Table 2 shows the standard specifications of theshows the product’s front panel and LIB.

SANUPS A11M-Li.

5. Conclusion
This article introduced the SANUPS E11B -Li and
SANUPS A11M-Li.
The SANUPS E11B-Li can be used with peace of mind
even in regions with unstable power grids and in harsh
operating environments. It offers benefits such as a longer
product life and lightweight thanks to the LIB’s high energy
density. It can therefore be proposed to customers all over
the world.
The SANUPS A11M-Li offers the same benefits as the
SANUPS E11B-Li, and is also capable of parallel redundant
operation. It can be proposed to customers who require asmall-capacity, high-reliability UPS.

Fig. 8 Front panel and LIB

We will continue to accurately identify the needs of ourcustomers and quickly develop products that can meet theseneeds.

27

SANYO DENKI Technical Report No.52 November 2021

Development of the Small-Capacity UPS SANUPS E11B-Li and SANUPS A11M-Li Series

Table 1 Standard specifications of the SANUPS E11B-Li 1 kVA model
Items

Topology

HybridCooling method
Input plug
Number of phases/wires
Rated voltage

Rated frequency
Frequency range

Forced air coolingIEC 60320-C14
Single-phase 2-wire
100/110/115/120 V
At load levels < 40%: 55 to 150 V
At load levels < 70%: 68 to 144 V
At load levels ≥ 70%: 80 to 144 V
Within ±8% of rated voltage
50/60 Hz
40 to 120 Hz

Required capacity

1.1 kVA or less

Input power factor

0.95 or greater

Output outlets
Number of phases/wires
Rated voltage
Voltage regulation
Rated frequency

NEMA 5-15R × 6
Single-phase 2-wire
100/110/115/120 V
Within ±2% of rated voltage
50/60 HzAC input

Model
Output capacity

Ratings and standards
E11BL102 100 V class
E11BL102 200 V class
1 kVA / 0.8 kW

Voltage range

Interruption occurs when transferring
to battery power from Economy mode

200/208/220/230/240 V
At load levels < 40%: 110 to 300 V
At load levels < 70%: 136 to 288 V When in Double Conversion modeAt load levels ≥ 70%: 160 to 288 V
When in Economy mode
(auto-sensing)Max. capacity during battery recovery
charging
In Double Conversion mode, at rated
outputIEC 60320-C13 × 6
200/208/220/230/240 V

Within ±1% of rated frequency
Frequency regulation

Within ±1/3/5% of rated frequency

AC output
Battery

Voltage waveform
Voltage harmonic
distortion
For abrupt
load change
For loss/
Transient
return ofvoltage
input powerfluctuation
For abrupt
input voltagechangeResponse time
Load power factor
Overcurrent protection
Inverter
Overload
protection Bypass

15 A (current protector)

Type
No. of batteries
Capacity

Lithium-ion battery
2
40 Ah·cell

Backup time

4 min

Sinusoidal
At linear load: 3% or less
At 100% rectifier load: 8% or lessEnvironment

User-selectable
When in Double Conversion mode
Same as the input frequency (auto-select)
In fixed Double
During battery
Conversion mode
operation: Within
In “automatic”±0.5%
setting
At rated output
0⇔100% load step changes at rated
input
At rated output

Within ±5% of rated voltage

For ±10% changes
When in Double Conversion mode
5 cycles or less
0.8 (lagging)
Automatic transfer to bypass circuit at 105% or more105%
8 A (current protector)

25 W
Heat dissipation

Remarks

130 W
Ambient temperature: -10 to +55˚C
Relative humidity: 20 to 90% (non-condensing)
41 dB or lessAcoustic noise
51 dB or less

Variation range: 0.7 (lagging) to 1.0
With automatic retransfer function
200 ms
200% for 30 s, 800% for 2 cycles(reference values)
Serial connection
At a 25˚C ambient temperature,using new, fully charged batteries.
When in Economy mode
When in Double Conversion modeand batteries fully charged
Battery charging stops when outside
the ambient temperature range
When in Economy
1 m from front
mode
of device,
When in Double
A-weighting
Conversion mode

SANYO DENKI Technical Report No.52 November 2021

28

Table 2 Standard specifications of the SANUPS A11M-Li
Items
Model
Rated output
capacity

A11ML102 100 V class
N configuration

Topology

Double conversion online

Cooling method

Forced air cooling

Depends on the no. of units in parallel

AC inputNumber of phases/wires

Single-phase 2-wire

Rated voltage

100/110/115/120 V

200/208/220/230/240 V

Voltage range

At load levels < 40%: 55 to 150 V
At load levels < 70%: 68 to 140 V
At load levels ≥ 70%: 80 to 140 V

At load levels < 40%: 110 to 300 V
At load levels < 70%: 136 to 280 V
At load levels ≥ 70%: 160 to 280 V

Rated frequency

50/60 Hz

Frequency range

Remarks

A11ML102 200 V class

1.0 to 8.0 kVA / 0.8 to 6.4 kW

N+1 configuration 1.0 to 7.0 kVA / 0.8 to 5.6 kW

Depends on the output voltage
settings

40 to 120 Hz

N configuration

1.1 to 8.2 kVA

N+1
configuration

1.2 to 7.2 kVA

Depends on the no. of units in parallel
Max. capacity during battery recovery
charging

Input power factor

0.95 or greater

At rated output

Number of phases/wires

Single-phase 2-wire

Rated voltage

100/110/115/120 V

Voltage regulation

Within ±2% of rated voltage

Rated frequency

50/60 Hz

Frequency regulation

Within ±1/3/5% of rated frequency

Voltage harmonic distortion

At linear load: 3% or less
At 100% rectifier load: 8% or lessRequired
capacity

200/208/220/230/240 V

AC output

Transient
For loss/return
voltageof input powerfluctuation
For abrupt input
voltage change

User-selectable
Same as the input frequency(auto-select)

At rated output
0⇔100% load step changes at rated
input

For abrupt loadchangeWithin ±10% of rated voltage

At rated output
For ±10% changes

Response time

5 cycles or less

Load power factor

0.8 (lagging)

Variation range: 0.7 (lagging) to 1.0

Overcurrent protection

Automatic transfer to bypass circuit at 105% or more

With automatic retransfer function

Inverter

105%

200 msBypass

200% (for 30 s), 800% (for 2 cycles)

Overload
protection
Type

Lithium-ion battery

No. of batteries2

Per unit. Serial connection

Capacity

40 Ah·cell

Per unit

Backup time

4 min

At a 25˚C ambient temperature,using new, fully charged batteries,
with N units used

Heat dissipation

130 to 1040 W

Depends on the no. of units in parallel
When batteries are fully charged

Environment

Ambient temperature: -10 to +55˚C
Relative humidity: 20 to 90% (non-condensing)Battery charging stops when outside
the ambient temperature range

Acoustic noise

54 to 59 dB

Depends on the no. of units in parallel
1 m from front of device, A-weighting

Battery
29

Ratings and standards

SANYO DENKI Technical Report No.52 November 2021

Development of the Small-Capacity UPS SANUPS E11B-Li and SANUPS A11M-Li Series

References(1) Hiroyuki Hanaoka and 6 others: Development of the SmallCapacity UPS SANUPS A11M Series
SANYO DENKI Technical Report, No. 48, pp. 22-27 (November,
2019)(2) Akihiro Tsukada and 7 others: Development of the SANUPS E11B
Hybrid UPS
SANYO DENKI Technical Report, No. 51, pp. 22-26 (May 2021)

AuthorHiroshi Sakaba
Design Dept., Power Systems Div.
Works on the development and design of power supplies.

Hiroyuki Hanaoka
Design Dept., Power Systems Div.
Works on the development and design of power supplies.

Akihiro Tsukada
Design Dept., Power Systems Div.
Works on the development and design of power supplies.

Kazuya Nishizawa
Design Dept., Power Systems Div.
Works on the development and design of power supplies.

Yuhei Shoyama
Design Dept., Power Systems Div.
Works on the development and design of power supplies.

Takuya Ozawa
Design Dept., Power Systems Div.
Works on the development and design of power supplies.

Hidenori Takizawa
Design Dept., Power Systems Div.
Works on the mechanical design of power supplies.

Yuki Takayama
Design Dept., Power Systems Div.
Works on the development and design of power supplies.

SANYO DENKI Technical Report No.52 November 2021

30

Feature: Technology for Protecting People

Servo Technology
for Protecting People
Hideaki Kodama

Hidetoshi Hayashi

Shusaku Magotake

Shinichi Takeda

Yuqi Tang

Shogo Yoda

1. Introduction

2.1 Equipment overview
Fig u re 1 show s t he ap p ea ra nc e of a n autom at ic

Advances in servo systems have mainly done throughbiochemical analyzer. An automatic biochemical analyzer

contribution to monozukuri (manufacturing) such as

uses blood or urine to induce a reaction with a reagent,

for machine tools, injection molding machines, andto analyze the components of the sample such as sugars,

semiconductor manufacturing equipment. Moreover, these

proteins, and lipids.

systems are increasingly being used in medical and welfare
equipment to maintain people’s health. Servo systems
are now expected to contribute toward manufacturing,m a i nt a i n i n g p e o p l e’s h e a lt h , a n d p r e s e r v i n g t h eenvironment.(1)In this article, we’ll introduce our Servo Systems products
used in medical devices to protect people’s health. We’llthen introduce our technology that protects people’s safety,
using our production line where this servo product ismanufactured as an example.
First, we introduce a Servo Systems product used withmedical analysis equipment. Next, we introduce an example
of using a Servo Systems product with a cutting-edge
remote pipette operation system for cell culturing. Finally,
we introduce our servo technology that protects the safety

Fig. 1 Automatic biochemical analyzer

of factory workers taking an example of a motor assembly
process in which people work together with robots.

2.2 Example of usage in equipment
With an automatic biochemical analyzer, the specimen

2. Use with Medical Analysis
Equipment
The medical field is supported by a wide variety ofused to dispense the specimen sample and reagents. Thisequipment uses many motors so that these processes are all
performed automatically.

medical devices. One example of such a device is medical

Figure 2 shows an example where stepping motors areanalysis equipment, which is crucial in diagnosing illness

used in an automatic biochemical analyzer. Stepping motors

and determining an individual’s state of health.

can be easily installed inside the equipment and are capable

There are various types of analysis equipment, such asof performing highly accurate positioning control. This

genetic testing equipment, automatic biochemical analyzers,

makes them very suitable for use in controlling the shaft ofblood testing equipment, and urine testing equipment.

the turntable and the pivot shaft of the pipette.

Many stepping motors are used in these kinds of medical
analysis equipment. This chapter introduces some of our
products used in medical devices, taking an automaticbiochemical analyzer as an example.

31

sample and reagents are placed on a turntable. A pipette is

SANYO DENKI Technical Report No.52 November 2021

Servo Technology for Protecting People

linear servo motor(4) that is installed in the end effector of aremote robot arm of an advanced remote pipette operation
system for cell culturing.

3.1 Equipment overview
Remote pipette operation usi ng a 5G mobi lecommunications system and robot arms is illustrated in
Figure 4 (operator side) and Figure 5 (remote robot armside).(3) A remote pipette operation system for cell culturing
has two basic requirements. First, the operator must feelFig. 2 Illustration of stepping motors in use

no delay. Second, the remote robot arm must accurately
mimic the movement of the operator. The following two
technologies are required to achieve these.

2.3 Product specifications(Stepping motors)
The SANMOTION F series 42 mm sq. 2-Phase 1.8° stepping
motor (2) achieves low noise, high torque, and low energy

1) Technology to eliminate delay when transferring
operator movement data
2) Pipette operation system that accurately mimics
operator movements

consumption. It is often used in medical analysis equipment.

The SANMOTION compact cylinder linear servo motor

Its increased torque improves the testing speed, and lower

is used in the remote pipette operation system for cell

noise reduces the burden on the medical technician, andculturing to operate the pipette in the remote robot arm’s

increased efficiency results in reduced heat generation andend effector. It is capable of accurately mimicking thebetter energy savings, contributing to the medical field.

movement of an expert operator as they move the pipette.

Fig. 3 Appearance of SF2422 typeFig. 4 Pipette operation (operator side)

3. Use with Remote Pipette Operation
System for Cell Culturing
The field of regenerative medicine has made rapid
advances in Japan, and this has significantly increased thedemand for cell culturing. On the other hand, insufficient
workplace safety and staffing shortages are two issues faced
by individuals involved in cell culturing, and there is apressing need to develop technology to resolve these issues.
In response, products are now being developed to allow
pipette operation to be performed remotely that use a
5G mobile communications system and robot arms. This
chapter introduces the SANMOTION compact cylinder

Fig. 5 Pipette operation (remote robot arm side)

SANYO DENKI Technical Report No.52 November 2021

32

3.2 Compact cylinder linear servo motor
specifications and features
Figure 6 shows the appearance and structure of the
SANMOTION compact cylinder linear servo motor. This

4. Motor Assembly Process
Technology for People to Work
Together with Robots

compact linear servo motor has an all-in-one structure

We u s e c o l l a b o r a t i v e r o b o t s i n p r o c e s s e s f o r

with a built-in linear encoder and linear guide, with amanufacturing the stepping motors used in medical devices

width of only 12 mm. The inside of the stainless steel pipeso that workers can safely and reliably perform complicatedis composed of a mover with a built-in magnet and a stator

tasks in limited spaces.

with a stationary power supply cable, downsizing the motor
and achieving ease of use.

In this chapter, we introduce our specialty technologythat protects the safety of workers that is used in a motor
assembly process in which people work together with robots.

4.1 Assembly process in which people work
together with robots
Figure 7 shows a stepping motor assembly line. This
manufacturing line performs all tasks from assembly tochecking for 56 mm sq. size(5) motors.

Fig. 6 SANMOTION compact cylinder linear motor
The motor has a maximum thrust of 16.5 N and a rated
thrust of 5.1 N, achieving both increased thrust anddownsizing. The maximum acceleration with no load is 37.4
G. This motor is expected to play an important role in a wide

Fig. 7 56 mm sq. stepping motor assembly line

variety of fields thanks to its high-acceleration/deceleration
operation and high-speed positioning.

of the line. These supply parts to workers. Once a robot

making it suitable for precision positioning operations. This

supplies a part, it then searches and picks next part whileallows for fine control when suctioning, dispensing, andthe worker is busy with assembly work. In this way, people

measuring small amounts of liquids when using a pipetteand robots work together to establish a seamless assembly

during the cell culturing process, without damaging cells.

line. Figure 8 shows the collaborative robots installed when

The compact cylinder linear servo motor has a corelessbuilding the line.

linear structure with a back yoke. There is no fluctuation

Image recognition cameras are mounted on the end

in thrust caused by magnetic fluctuation, and its operation

effector of robots. These are used to capture images of theis smooth and responsive. This allows an expert operator

parts being picked. This image data is used to recognize

to control the pipette in real time with the robot arm end

differences in height between parts as well as their locations,effector accurately mimicking their movements, making thisand to control the operation of the robots. This allows 3D

motor ideal for driving the end effector of a robot arm.

gripping technology to be used, which means that randomly

The SANMOTION compact cylinder linear servo motor

placed parts can be gripped.

contributes toward the development of remote pipette

Controlling the trajectory of movement at which the robot

operation systems for cell culturing that allow for finegrips parts based on image data is our specialty technology.

operations to be performed remotely, as a technology forprotecting people.

33

There are two collaborative robots placed at the head

The built-in linear encoder has a resolution of 1 μm,

SANYO DENKI Technical Report No.52 November 2021

Servo Technology for Protecting People

Fig. 8 Collaborative robot

4.2 Safe manufacturing with robots

Fig. 9 Robot gripper finger(Example of inherently safer design)Through making use of collaborative robots and carefully

W h e n b u i l d i n g a p ro d u c t io n l i n e t h at i n c lu d e s

designing the robot gripper, we ensured the safety of thecollaborative robots, it is important to ensure the safety of

stepping motor assembly line when workers and robots

workers. We repeatedly conducted risk assessments andmake contact.

implemented countermeasures to assess and respond topossible risks that could occur at the manufacturing site,
based on various safety standards including ISO/TS 15066

5. Conclusion(an international safety standard for collaborative robots)

In this article, we introduced some examples of using

and ISO 12100 (a basic safety standard). In this way, we wereservo technology in medical analysis equipment and aable to install collaborative robots, while ensuring worker

remote pipette operation system for cell culturing. These

safety.

examples show how our Servo Systems products can be

We implemented several safety measures. Contact

used in medical devices that protect people’s health.

between robots and people is classified into two categories

We also introduced an example of technology for safely

as defined in ISO/TS 15066: transient contact and quasi-

manufacturing these servo products.

static contact. These categories define how robots and

The motor technology used in medical analysis equipment

people come into contact. Momentary contact (such as

achieves lower noise, higher torque, and lower energy

impact) is classified as transient contact, while clamping isconsumption. This helps improve testing speed and reduceclassified as quasi-static contact.

equipment noise. Reducing the noise of medical devices can

The collaborative robots used here were configured tohelp reduce the burden on medical technicians and patients.

stop immediately if any transient contact is made. This is

We used a compact cylinder linear servo motor with large

done by lowering the torque limit (tolerance) on any axes

thrust and high response in the remote pipette operationthat experience a high external reactive force when impact

system for cell culturing. This allows an expert operator to

occurs.

control a remote pipette in real time, with the robot arm

Quasi-static contact (clamping) would mainly occur withaccurately mimicking their movements.

the worker’s hands or fingers during parts gripping. We set a

We also introduced our specialty technology that protects

torque limit during the downward motion of axes to ensure

people’s safety using an example of a motor assembly

safety when the robot is operating. When designing theprocess in which people work together with robots, where

robot gripper finger, we gave it a rounded shape and madecontact between people and robots was carefully designed

use of an inherently safer design to reduce the risk of injury

for safety.

to workers.
Figure 9 shows the robot gripper finger we designed, as an
example of an inherently safer design.

Expectations for our Servo Systems technology willcontinue to grow for use as technology for protecting
people’s health and safety, and as technology for protecting
the global environment. We are committed to developing
servo systems that will continue to meet these expectations
and provide new value.

SANYO DENKI Technical Report No.52 November 2021

34

Servo Technology for Protecting People

References

Author(1) Daigo Kuraishi and 2 others: Current Status and Future Prospects
of Servo Systems

Hideaki Kodama

Journal of JSPE, March 2021 Issue, pp. 257-261 (Vol. 87, No. 3,

Design Dept. 2, Servo Systems Div.
Works on the development and design of motion controllers.

2021)(2) Koji Nakatake and 6 others: Development of the SANMOTION F
Series 42 mm sq. 2-Phase 1.8° Stepping Motor

Hidetoshi Hayashi

SANYO DENKI Technical Report, No. 45, pp. 30-33 (2018.5)

Design Dept. 1, Servo Systems Div.
Works on the development and design of servo motors.

(3) Taisei Corporation: Successful Implementation of Remote Control
for Cell Culturing Pipette Using 5G and Robot Arms
https://www.taisei.co.jp/about_us/wn/2021/210510_8133.html

Shusaku Magotake(May 10, 2021)

Production Engineering Dept., Servo Systems Div.
Works on the production engineering of motion controllers andservo ampliﬁers.

(4) Yuqi Tang and another: Development of Compact Cylinder Linear
Servo Motor SANMOTIONSANYO DENKI Technical Report, No. 38, pp. 42-45 (November
2014)(5) Shogo Yoda and 5 others: Development of the SANMOTION F
Series 56 mm sq. 2-Phase 1.8° Stepping Motor
SANYO DENKI Technical Report, No. 52, pp. 33-36 (November

Shinichi Takeda
Production Engineering Dept., Servo Systems Div.
Works on the production engineering of servo motors andstepping motors.

2021)

Yuqi Tang
Design Dept. 1, Servo Systems Div.
Works on the development and design of linear servo motors.
Doctor of Engineering.

Shogo Yoda
Design Dept. 1, Servo Systems Div.
Works on the development and design of stepping motors.

35

SANYO DENKI Technical Report No.52 November 2021

New Product Introduction

Development of the SANMOTION F
Series 56 mm sq. 2-Phase 1.8°
Stepping Motors
Shogo Yoda

Koji Nakatake

Yasushi Yoda

Takayoshi Seki

Ryo Matsuo

Fumiharu Yamazoe

1. Introduction
Stepping motors help simplify systems because they
feature open loop control that can perform highly accurate
positioning and speed control even without any positionor speed sensors. They are used in a wide variety offields, including office automation equipment and generalindustrial machinery. Demand for these products has
been growing in recent years, and especially for use in
semiconductor manufacturing equipment and medical
devices. Products in these fields are required to have hightorque, low noise, and low energy consumption. We released
the SANMOTION F 42 mm sq. 2-Phase 1.8° stepping
motors(1) in 2017 to great acclaim.
Against such a backdrop, we expanded the lineup with a
newly developed SANMOTION F 56 mm sq. 2-Phase 1.8°

Fig. 1 Appearance of the new model(SM2562 type, bipolar)

stepping motors.
Our goal was to increase torque approximately 40%

customization had resulted in a number of different models

compared to our current model, as well as reduce noise andfor the current model, and it was difficult for customers toincrease efficiency. We also enriched the lineup of options.

manage parts. For the new model, harness customization is

T h i s a r t icle b eg i n s by show i ng t he new mo del s’handled using a relay harness, and the standardized motor

appearance, lineup, and specifications. We then discuss the

makes it easier to manage parts.

design concept we applied for the new models to increase
torque, reduce noise, and reduce power consumption. This

2.2 External dimensions

is followed by an explanation of how this was accomplished,

Figure 2 provides the major dimensions of the newalong with a comparison with the current model. Finally, we

model. For mounting compatibility with the current models,

discuss customizability and the lineup of options.

the new models’ flange size is 56 mm sq., with the same
mounting pitch and fitting part dimensions as the current

2. Specifications

models. With this, replacement of the current models with

2.1 Appearance

their equipment mounting specifications. We also used

Figure 1 shows the appearance of the new model.
Regarding the connection, although all of the current
models (103H712 series) were lead types, the new models areconnector types as standard. The advantage of a connector

new models is easy without requiring customers to changea standard shaft diameter of ø8 mm with increased shaft
strength to handle the increased torque.
As with the current models, shaft specifications can becustomized tailor to customer requests.

type is that you can connect a harness after mounting the
motor to equipment. This makes handling of leads andmounting the motor to equipment easier. Also, harness

SANYO DENKI Technical Report No.52 November 2021

36

5

1.5
+1
15 0

56±1

□

4-47.14±0.2
33 or less0
ø38.1-0.025

0ø8-0.015

11以下

+0.5
4-ø4.5 0

20.6±0.5

S

S

Connector: B4P-VH

12 or less

L±10
ø8-0.015

15.5±1

Cross section S-S
7.5±0.15

7.5±0.15

Fig. 2 Dimensions of the new model
Table 1 Unipolar motor lineup and main specifications
Model no.
Single shaft
SM2561C10U41
SM2561C20U41
SM2561C30U41
SM2562C10U41
SM2562C20U41
SM2562C30U41
SM2563C10U41
SM2563C20U41
SM2563C30U41
SM2564C10U41
SM2564C20U41
SM2564C30U41

Dual shaft
SM2561C10U11
SM2561C20U11
SM2561C30U11
SM2562C10U11
SM2562C20U11
SM2562C30U11
SM2563C10U11
SM2563C20U11
SM2563C30U11
SM2564C10U11
SM2564C20U11
SM2564C30U11

Holding torqueat 2-phase excitation
N m or more
0.53
0.53
0.53
1.1
1.1
1.1
1.7
1.7
1.7
1.75
1.75
1.75

Rated
current
A/phase
1
2
3
1
2
3
1
2
3
1
2
3

Winding
inductance
mH
6.8
1.8
0.77
12.6
3.3
1.37
17
4.2
1.75
22
5.4
2.2

Rotor
inertia
×10 -4kg m 2
0.14
0.14
0.14
0.28
0.28
0.28
0.5
0.5
0.5
0.6
0.6
0.6

Mass
kg
0.49
0.49
0.49
0.69
0.69
0.69
1.1
1.1
1.1
1.27
1.27
1.27

Motor length
(L)
mm
41.8
41.8
41.8
53.8
53.8
53.8
75.8
75.8
75.8
85.8
85.8
85.8

Table 2 Bipolar motor lineup and main specifications
Model no.
Single shaft
SM2561C10B41
SM2561C20B41
SM2561C30B41
SM2561C40B41
SM2561C60B41
SM2562C10B41
SM2562C20B41
SM2562C30B41
SM2562C40B41
SM2562C60B41
SM2563C10B41
SM2563C20B41
SM2563C30B41
SM2563C40B41
SM2563C60B41
SM2564C10B41
SM2564C20B41
SM2564C30B41
SM2564C40B41
SM2564C60B41

37

Dual shaft
SM2561C10B11
SM2561C20B11
SM2561C30B11
SM2561C40B11
SM2561C60B11
SM2562C10B11
SM2562C20B11
SM2562C30B11
SM2562C40B11
SM2562C60B11
SM2563C10B11
SM2563C20B11
SM2563C30B11
SM2563C40B11
SM2563C60B11
SM2564C10B11
SM2564C20B11
SM2564C30B11
SM2564C40B11
SM2564C60B11

Holding torqueat 2-phase excitation
N m or more
0.75
0.75
0.75
0.75
0.75
1.4
1.4
1.4
1.4
1.4
2.35
2.35
2.35
2.35
2.35
2.5
2.5
2.5
2.5
2.5

SANYO DENKI Technical Report No.52 November 2021

Rated
current
A/phase
1
2
3
4
6
1
2
3
4
6
1
2
3
4
6
1
2
3
4
6

Winding
inductance
mH
13.5
3.5
1.5
0.85
0.38
25.5
6.5
2.9
1.5
0.72
36
9.5
4.2
2.4
1.05
41
11
4.9
2.8
1.15

Rotor
inertia
×10 -4kg m 2
0.14
0.14
0.14
0.14
0.14
0.28
0.28
0.28
0.28
0.28
0.5
0.5
0.5
0.5
0.5
0.6
0.6
0.6
0.6
0.6

Mass
kg
0.49
0.49
0.49
0.49
0.49
0.69
0.69
0.69
0.69
0.69
1.1
1.1
1.1
1.1
1.1
1.27
1.27
1.27
1.27
1.27

Motor length
(L)
mm
41.8
41.8
41.8
41.8
41.8
53.8
53.8
53.8
53.8
53.8
75.8
75.8
75.8
75.8
75.8
85.8
85.8
85.8
85.8
85.8

Development of the SANMOTION F Series 56 mm sq. 2-Phase 1.8° Stepping Motors

2.3 Lineup and main specifications

3.2 Low noise

Ta b l e 1 a n d Ta b l e 2 s h ow t h e l i n eu p a n d m a i nCompared with the current models, the noise level of

specifications for unipolar and bipolar type stepping motors,

the new models in their operating speed range has been

respectively. The new models are available in four motor

reduced by 3 dB. This is equivalent to reducing acoustic

lengths—41.8 mm, 53.8 mm, 75.8 mm, and 85.8 mm. 12

energy by half. Stepping motors are often used in medical

unipolar models and 20 bipolar models are available with

devices, and equipment is often used near medical personnel

single shaft and dual shaft models, for a total of 64 standard

and patients. So, this equipment is required to operatemodels. The motor length of the new models is the same

quietly. To achieve low noise, we incorporated the following

as or shorter than the current models, making replacement

innovative ideas.

with the same size easy and even downsizing is possible.

(1) High-rigidity stator core

The new models also conform to the UL and cUL safety
standards as standard.

We analyzed the structure of the stator core, anddetermined the back yoke and pole shapes to increase therigidity of the stator structure.

3. Product Features(2) High-rigidity motor

3.1 High torquefitting parts would be easier to assemble while maintaining

We designed the new models so that the bracket and stator

The new models provide approximately 40% higher
torque in the operating speed range compared with thehigh motor rigidity. We optimized the tightening allowanceand engagement length.

current models. Figure 3 shows a comparison of the

By designing the stator structure and motor with higher

rotational speed vs. torque characteristics of the new

rigidity, we were able to optimally distribute the fixedand current models. Stepping motors have an extremely

vibration value and reduce noise.

narrow gap between the stator and rotor, and the amount ofmagnetic flux in the gap has a significant effect on torque.
We decided to use a magnet with high residual magnetic

100%

-27%

Current model

100%
-48%

flux density for the new models. We also improved the

New model

73%

machining accuracy of parts such as the stator and rotor, and52%

carefully designed our assembly processes and facilities. We
increased both machining accuracy and assembly accuracy,
and were able to reduce the gap length by 28% while
maintaining the same productivity and quality. We useda design with a higher amount of magnetic flux in the gap
and increased torque even at high speeds, helping customer
equipment operate faster.

Input current

Temperature rise

Fig. 4 Comparison of input current
and temperature rise (SM2562C30B41)

1.6

3.3 Reduced power consumption throughincreased motor efficiency

No. of steps: Full step
Input voltage: 24 VDC
Torque [N m]

1.2

Compared to the current model, the new model is

New
model

approximately 3% more efficient. We increased the winding

0.8

fill factor in the slot, reduced copper loss, and made use of
the optimal core design to reduce iron loss. This allowed us

0.4

to reduce overall loss. The reduction of these losses together

Current
model
0

0

500

0

2

1000

1500
2000
Speed [min-1]

4
6
Pulse rate [kpulse/s]

2500

3000

8

10

Fig. 3 Rotational speed vs. torque characteristics(SM2562C30B41)

with the increased torque discussed above made it possible
to achieve equivalent torque to the current models with lessinput current.
Figure 4 shows an example comparing the input current
and motor temperature increase for SM2562C30B41. Whenthe torque is the same as the current models, the input
current of the new models can be reduced 27%. This results
in a 48% reduction in the temperature increase of the motor.

SANYO DENKI Technical Report No.52 November 2021

38

Development of the SANMOTION F Series 56 mm sq. 2-Phase 1.8° Stepping Motors

This reduces heat generation in equipment and contributes

contribute toward creating new value when used in customer

to energy savings.

equipment. We will continue our efforts to further improve
stepping motor performance and functionality, and to

3.4 Customizability and a wide lineupof options
As with the current models, we designed the new models
so that it can be easily customized. It can be customized

develop products that will satisfy even more customers.
References(1) Koji Nakatake and 6 others: Development of the SANMOTION F

as required by the customer. For example, the axial shape

Series 42 mm sq. 2-Phase 1.8° Stepping Motor

could be changed, or a tap hole on a bracket could be added.

SANYO DENKI Technical Report No. 45, pp. 30-33 (2018.05)

We also added more options and designed a lineup of
standard options, including models with gears and models
with encoders. Table 3 shows the lineup of options. We

Authorprepared a lineup of models with gears, consisting of six
low-backlash gear models with different speed-reduction

Shogo Yoda

rates, and two harmonic gear models. We prepared a lineup

Design Dept. 1, Servo Systems Div.
Works on the development and design of stepping motors.

of models with encoders, consisting of three models withdifferent step numbers. We also offer a lineup of models
with electromagnetic brakes. With this, customers canKoji Nakatake

easily customize products to suit their equipment, and canDesign Dept. 1, Servo Systems Div.
Works on the development and design of stepping motors.

select from a wide lineup of options for greater flexibility indesigning equipment.

Yasushi Yoda
Table 3 Lineup of options
Low-backlash
gear
Harmonic gear

Encoder

Electromagnetic
brake

Gear ratio

1:3.6, 1:7.2,
1:10, 1:20,
1:30, 1:36

Backlash

0.55° or lessGear ratio

1:50, 1:100

Microsteps

1000, 2000,
4000 P/R

Number of channels

3

Output circuit

Line driver

Input voltage

5 VDC ±5%Input voltage

24 VDC ±5%

Fumiharu Yamazoe

Static friction torque

0.8 N m or more

Design Dept. 1, Servo Systems Div.
Works on the development and design of stepping motors.

4. Conclusion
In this article, we introduced the lineup, specifications,and features of the SANMOTION F 56 mm sq. 2-Phase 1.8°
stepping motor.
For the new models, we increased torque approximately
4 0%, reduced noise 3 d B, and i ncreased ef f iciency
approximately 3% compared with the current models. We
switched to using a connector type so we could use the same
motor for harness customization. The new models can easily
replace the current models thanks to the mounting and size
compatibility. We also enhanced the lineup of options.
T he new stepping motors are easy to use and can

39

Design Dept. 1, Servo Systems Div.
Works on the development and design of stepping motors.

SANYO DENKI Technical Report No.52 November 2021

Takayoshi Seki
Design Dept. 1, Servo Systems Div.
Works on the development and design of stepping motors.

Ryo Matsuo
Design Dept. 1, Servo Systems Div.
Works on the development and design of stepping motors.

52

November2021

https://www.sanyodenki.com/

Published in Japan on November 15, 2021 by SANYO DENKI CO., LTD.
Published semi-yearly
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Phone +81 3 5927 1020
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